Definition. A metric space is a set X together with a function d (called a metric or distance function) which assigns a real number d (x, y) to every pair x, y X satisfying the properties (or axioms): 1  d (x, y) 0 and d (x, y) = 0 x = y, 2  d (x, y) = d (y, x),
Here are some facts and guidelines about formaldehyde in plywood and OSB that can help you when building a chicken coop: 1  Formaldehyde is used in the binders and resins of some manufactured wood products. 2  Offgassing can be an issue with products containing urea-formaldehyde (UF) resins.
Answers. Best Answer: Formaldehyde does not exist in nail polish. It is used in some nail hardeners but not in the actual polish. A resin, tosylamide/formaldehyde resin, makes the polish tough and resilient.While the resin is manufactured from formaldehyde, once the product becomes a resin, the formaldehyde is chemically changed and essentially no longer present.or example, OPI states they do not use formaldehyde in their polishes, with the exception of 2-3 nail hardeners (which they named). But upon looking at the ingredients of even some of their newer polishes (colors from the 2009 holiday collection or the Spain collection, for example) an...